Here's what he had to say below.
"I set out with a very simple problem: There is no reason for these people to be in the same movie. So that's what my movie has to be about. So much of the movie takes place from Steve Rogers' (Chris Evans) perspective, since he's the guy who just woke up and sees this weird ass world. Everyone else has been living in it."
Marvel's the Avengers also stars Robert Downey Jr. as Iron Man, Chris Hemsworth as Thor, Scarlett Johansson as the Black Widow, Jeremy Renner as Hawkeye, Mark Ruffalo as The Incredible Hulk, Samuel L. Jackson as Nick Fury, and Tom Hiddleston as the villainous Loki.
Marvel's The Avengers was released May 4th, 2012 and stars Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Tom Hiddleston, Clark Gregg. The film is directed by Joss Whedon.